521304716 has 12 divisors (see below), whose sum is σ = 914463480. Its totient is φ = 260029440.

The previous prime is 521304703. The next prime is 521304739. The reversal of 521304716 is 617403125.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153845 + ... + 157196.

It is an arithmetic number, because the mean of its divisors is an integer number (76205290).

Almost surely, 2^521304716 is an apocalyptic number.

It is an amenable number.

521304716 is a deficient number, since it is larger than the sum of its proper divisors (393158764).

521304716 is a wasteful number, since it uses less digits than its factorization.

521304716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311464 (or 311462 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 521304716 is about 22832.0983704959. The cubic root of 521304716 is about 804.8171419599.

The spelling of 521304716 in words is "five hundred twenty-one million, three hundred four thousand, seven hundred sixteen".